How we measure, and what the numbers mean.
Each figure is one we put in writing.
- within 0.5%Wall lengths. About 1 inch on this wall.
- to 1/4 inchHow every dimension is labelled.
- within 1%Room areas. About 2 ft² here.
- ±5 cmHeights, where the laser measured them.
- LOD 200Model detail: walls, openings, stairs, rooms.
About an hour on site
The average for a 2,000 sq ft house. Size, things in the way and the files you need can change that; your quote confirms the time.
The figures, row by row
- Plan dimensions
- within 0.5%
- About 1.5 cm on a 3 m wall, or 5/8 inch on a 10 ft wall: plenty for laying out a kitchen or placing a wall. Anything ordered to size, like a countertop, still gets the installer’s final measure.
- Areas
- within 1%
- A 200 sq ft room is within about 2 sq ft, computed from its measured outline.
- Dimension labels
- to 1/4 inch
- Labels are rounded to the nearest 1/4 inch for reading. That is not a claim of 1/4-inch accuracy.
- Ceiling, door and window heights
- ±5 cm
- A vertical laser pass in key rooms and stairwells reads ceiling, door and window heights within ±5 cm. Where the laser can’t reach, a height comes from the photographs or a standard size.
- Model detail
- LOD 200
- Walls with thickness, floors, openings, stairs, and rooms with names and areas: enough for design, renovation planning and permit base drawings. Furniture, roof and services are not modelled.
For people who speak in LOA
In USIBD terms (LOA20 is 15–50 mm, LOA30 is 5–15 mm), plan dimensions sit roughly at LOA20–30 and heights at LOA10–20. Tighter than that needs a different instrument.
When you need someone else
- Property lines, boundaries and topography: an Ontario Land Surveyor.
- Structural questions: a structural engineer.
- Glass railings and glass stairs: a total-station layout by the glass fabricator.
Not sure which one your project needs? Ask, and we’ll tell you.